Ebook Handbook of polymer synthesis

... Ti(benzyl)4 1: 2.5 1: 6 1: 6:3 1: 2 1: 105.5  10 2 1: 100 1: 1000 1: 50 1: 5 1: 300 30 30 15 20 20 70 20 50 80 16 0 80 20 20(80) 20 Refs 40–200 11 7 2000 11 7 7–45 11 8 35 000 >15 000 11 0 200 >5 000 11 9 400 000 >10 ... h)] Mw  10 À3 [g/mol] m.p [ C] Isotacticity [% mmmm] 18 8 19 0 48 99 245 97 10 403 755 750 875 24 36 24 19 5 213 31 19 330 729 11 35 920 13 2 13...

Ngày tải lên: 13/08/2014, 16:21

... the absence of chain transfer Coordinative Polymerization Few data have been reported on the coordinative Ziegler–Natta-type polymerization of a-MeSt Some papers of Sakurada [20 0 ,22 0 22 2] describe ... poisoning of the active centers While the m isomer could not be polymerized at all, both the o and p isomers gave varying yields of polymers with AlC12Et (27 %/ 92% ), AlClEt2 (4%/...

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... [34 2 34 4] [34 2] [34 2] [34 2] [34 2 ,34 3] [34 2 ,34 3] [34 2 34 4] [34 2] [34 2 ,34 3] [34 2] [34 3] [34 2] [34 3 ,34 4] [34 2] [34 3 ,34 4] [34 2 34 4] [34 4] [34 4] [34 3 ,34 4] [34 2 34 4] [34 4] [34 2] [34 2] [34 2] [34 2 34 4] ... [34 2 34 4] [34 2 ,34 3] [31 1] [34 2 ,34 3] Many authors [30 7 ,30 9 ,34 0 ,35 3 35 5] have investigated the dependence of the molecular weight of pol...

Ngày tải lên: 13/08/2014, 16:21

... butanone [49 5] or ethyl methyl ketone [47 0 ,47 6] with AIBN [49 6 49 9] and dioxane with benzoyl peroxide [47 4 ,48 4,500,503] In benzene as solvent the resulting polymer forms a slurry [5 04] AIBN can ... use of bipyridine instead of 4, 40 -di-(5-nonyl)2,20 -bipyridine causes a lower control of the polymerization because of the reduced solubility of the deactivator [309] In th...

Ngày tải lên: 13/08/2014, 16:21

... 492 493 494 4 95 496 497 498 499 50 0 50 1 50 2 50 3 50 4 50 5 50 6 50 7 50 8 50 9 51 0 51 1 51 2 51 3 51 4 51 5 51 6 51 7 51 8 51 9 52 0 52 1 52 2 52 3 52 4 52 5 52 6 52 7 52 8 52 9 53 0 53 1 Nowakowska, M (19 85) Polym Photochem., ... 54 8 54 9 55 0 55 1 55 2 55 3 55 4 55 5 55 6 55 7 55 8 55 9 56 0 56 1 56 2 56 3 56 4 56 5 56 6 56 7 Furuk...

Ngày tải lên: 13/08/2014, 16:21

... ¼ 2 ,6- Ph2-C6H3 [155] (14) R ¼ 2 ,6- Ph2-C6H3 [1 56] (15) L ¼ P(OMe)3, THF [159] ( 16) Ar ¼ 2 ,6- Ph2-C6H3 [ 162 ] (17) [ 163 , 164 , 165 ] (18) Ar ¼ 2 ,6- Ph2-C6H3 [ 167 ] (19) L ¼ PMe3; PEt3; TMS ¼ SiMe3 [ 169 ] ... Copyright 2005 by Marcel Dekker All Rights Reserved 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 Mango, F D....

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... (79 c) need to be mentioned [122] In this case the PEK backbone includes C–N bonds in addition to ether groups 72 Þ 73 Þ Copyright 2005 by Marcel Dekker All Rights Reserved  74 Þ 75 Þ 76 Þ 77 Þ ... fractions of cyclic OES were obtained and monodisperse cycles (from the dimer to the hexamer) were isolated by column chromatography [76 ,77 ] Two papers [73 ,75 ] describe detailed studies of...

Ngày tải lên: 13/08/2014, 16:21

... 3. 58 5.79 6.12 6. 28 6.35 6.53 6.61 6.71 6.91 7. 08 7.30 7.63 8. 12 32 68 2941 285 7 2793 1727 1634 1592 1575 1531 1513 1490 1447 1412 1370 1311 1232 m vs vs m m m m w s sh m m m s m sh 8. 22 8. 28 8.99 ... is the number of ml of HCl used for titration of the blank, S is the number of ml of HCl used for titration of the sample, N is the molarity of HCl solution, and W i...

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... the synthesis of these copolyimides In fact, many of the countless processable, aromatic polyimides described in last years, have ether linkages in their backbone [74,81, 197 – 199 ] The method of synthesis ... 0.342(p) À2.15 1.04 0.3 49( m) 0.354( p) À1.67 0.3 49( m) 0.354( p) À1. 59 À0.32 0.3 49( m) 0.355( p) À1.53 0.3 49( m) 0.354( p) À1.46 À0.80 0.351(m) 0.345( p) Dianhydrides...

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... 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 Schulz, R C., Muller, E., and Kern, W (1958) Naturwissenschaften, ... þ AgNO3 K2S2O8 AIBN Water Dioxane DMSO DMSO Dioxane Water Water Dioxane [102 ] [103 ] [104 ] [104 ] [101 ] [100 ,101 ] [102 ] [103 ] Methyl methacrylate Styrene 0.5 0.8 0.034 0.25 0.22 3....

Ngày tải lên: 13/08/2014, 16:21

... number of macrocycles n (degree of polymerization) with the number of bridged monomers b and the number of end monomers e n ¼ b=2 þ e=4 ð9Þ Evaluation of some data (determination of number of nitrile ... compactization of linear parts of polymers between covalently crosslinked points At low values of pH the complexation proceeds by substitution mechanism of protons of...

Ngày tải lên: 13/08/2014, 16:21

... Electrochemical Synthesis of Conducting Polymers in Handbook of Conducting Polymers, Vol (Skotheim, T A., ed.), Marcel Dekker, New York, p 82; Street, G B (1986) From Powder to Plastics in Handbook of Conducting ... fulvene are just a few of the large number of electrically conducting polymers with specific properties and interest [20] XIV SUBSTITUTED POLY(ACETYLENE)S [20,45] T...

Ngày tải lên: 13/08/2014, 16:21

... Murase et al [139 ] and Bradley ¨ [140] One of the major improvements was the use of tetrahydrothiophene instead of dimethyl sulphide in the synthesis of the precursor polymer [141] The use of the cyclic ... by Wessling [130 133 ] and Kanabe [134 ], starting from the monomers p-xylylene-bis(dimethylsulfonium tetrafluoroborate) [134 ] or chloride (Scheme 28) [130 133 ] ð28Þ The la...

Ngày tải lên: 13/08/2014, 16:21

... efficiency of 22 lm/W [3] Polyfluorene Copolymers The described synthesis of polyfluoren homopolymers allows also the design of alternating copolymers Instead of the 2,7-dibromofluorene a variety of dibromoarenes ... ratio of about 0.4 and an average degree of polymerization of about 30 [43] ð12Þ Phenylic substituents at the vinylene positions — increasing both solubility of t...

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... extent of reaction and degree of polymerization to the average functionality favg of the system At the gel point the number average degree of polymerization Xn becomes infinite and therefore the second ... importance of this first example of a solid phase synthesis on polymer support which was followed by the development of numerous polymeric reagents [148] Presently, the fa...

Ngày tải lên: 13/08/2014, 16:21